LSW: Properly set page transition and cleanup definitions on the way

Set slide animation by default and use it in all pages.
Fix wrong/missing slide animations on various transitions like WiFi
and the backup subpage.

Change-Id: I78c87f38eb615379d39c89b43a016ed2ffb98695

src/org/lineageos/setupwizard/LocationSettingsActivity.java

@@ -59,11 +59,6 @@ public class LocationSettingsActivity extends BaseSetupWizardActivity {
         mLocationAccess.setChecked(mLocationManager.isLocationEnabled());
     }
 
-    @Override
-    protected int getTransition() {
-        return TRANSITION_ID_SLIDE;
-    }
-
     @Override
     protected int getLayoutResId() {
         return R.layout.location_settings;